O'Reilly logo

Notes on Digital Signal Processing: Practical Recipes for Design, Analysis and Implementation by C. Britton Rorabaugh

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Note 62. Generating Analytic Signals with Frequency-Shifted FIR Lowpass Filters

A useful technique for designing FIR analytic signal generation (ASG) filters is presented by Reilly et al. in [1]. The basic idea is to design a “standard” lowpass filter having real-valued coefficients, and then phase-shift the impulse response coefficients such that the filter’s passband is shifted to cover only positive frequencies and the stopband is shifted to cover only negative frequencies. The phase-shifted coefficients are complex-valued. The details are provided in Design Procedure 62.1.

Example 62.1 attempts to implement a broadband, or “almost-all-positive pass” ASG filter using the approach of Design Procedure 62.1. Example 62.2 implements a more pronouncedly ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required